body
{
    margin: 0;
}

ul.sidenav
{
    list-style-type: none;
    margin: 0;
    padding: 0;
    width: 25%;
    background-color: #f8715f;
    position: fixed;
    height: 100%;
    overflow: auto;
}

ul.sidenav li a
{
    display: block;
    color: #000;
    padding: 8px 16px;
    text-decoration: none;
}

ul.sidenav li a.actvte
{
    background-color: #ff4d44;
    color: #9861ff;
}

ul.sidenav li a:hover:not(.actvte)
{
    background-color: #ff5df9;
    color: #65ebff;
}

div.context
{
    margin-left: 25%;
    padding: 8px 16px;
    height: 1000px;
}

@media screen and (max-width: 900px) {
    ul.sidenav
    {
        width: 100%;
        height: auto;
        position: relative;
    }

    ul.sidenav li a
    {
        float: left;
        padding: 15px;
    }

    div.context
    {
        margin-left: 0;
    }
}

@media screen and (max-width: 400px){
    ul.sidenav li a
    {
        text-align: center;
        float: none;
    }
}